1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* QEMU PowerPC pSeries Logical Partition capabilities handling
*
* Copyright (c) 2017 David Gibson, Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "sysemu/hw_accel.h"
#include "target/ppc/cpu.h"
#include "cpu-models.h"
#include "kvm_ppc.h"
#include "hw/ppc/spapr.h"
typedef struct sPAPRCapabilityInfo {
const char *name;
const char *description;
uint64_t flag;
/* Make sure the virtual hardware can support this capability */
void (*allow)(sPAPRMachineState *spapr, Error **errp);
/* If possible, tell the virtual hardware not to allow the cap to
* be used at all */
void (*disallow)(sPAPRMachineState *spapr, Error **errp);
} sPAPRCapabilityInfo;
static void cap_htm_allow(sPAPRMachineState *spapr, Error **errp)
{
if (tcg_enabled()) {
error_setg(errp,
"No Transactional Memory support in TCG, try cap-htm=off");
} else if (kvm_enabled() && !kvmppc_has_cap_htm()) {
error_setg(errp,
"KVM implementation does not support Transactional Memory, try cap-htm=off"
);
}
}
static sPAPRCapabilityInfo capability_table[] = {
{
.name = "htm",
.description = "Allow Hardware Transactional Memory (HTM)",
.flag = SPAPR_CAP_HTM,
.allow = cap_htm_allow,
/* TODO: add cap_htm_disallow */
},
};
static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr,
CPUState *cs)
{
sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
PowerPCCPU *cpu = POWERPC_CPU(cs);
sPAPRCapabilities caps;
caps = smc->default_caps;
if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_2_07,
0, spapr->max_compat_pvr)) {
caps.mask &= ~SPAPR_CAP_HTM;
}
return caps;
}
void spapr_caps_reset(sPAPRMachineState *spapr)
{
Error *local_err = NULL;
sPAPRCapabilities caps;
int i;
/* First compute the actual set of caps we're running with.. */
caps = default_caps_with_cpu(spapr, first_cpu);
caps.mask |= spapr->forced_caps.mask;
caps.mask &= ~spapr->forbidden_caps.mask;
spapr->effective_caps = caps;
/* .. then apply those caps to the virtual hardware */
for (i = 0; i < ARRAY_SIZE(capability_table); i++) {
sPAPRCapabilityInfo *info = &capability_table[i];
if (spapr->effective_caps.mask & info->flag) {
/* Failure to allow a cap is fatal - if the guest doesn't
* have it, we'll be supplying an incorrect environment */
if (info->allow) {
info->allow(spapr, &error_fatal);
}
} else {
/* Failure to enforce a cap is only a warning. The guest
* shouldn't be using it, since it's not advertised, so it
* doesn't get to complain about weird behaviour if it
* goes ahead anyway */
if (info->disallow) {
info->disallow(spapr, &local_err);
}
if (local_err) {
warn_report_err(local_err);
local_err = NULL;
}
}
}
}
static void spapr_cap_get(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
sPAPRCapabilityInfo *cap = opaque;
sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
bool value = spapr_has_cap(spapr, cap->flag);
/* TODO: Could this get called before effective_caps is finalized
* in spapr_caps_reset()? */
visit_type_bool(v, name, &value, errp);
}
static void spapr_cap_set(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
sPAPRCapabilityInfo *cap = opaque;
sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
bool value;
Error *local_err = NULL;
visit_type_bool(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (value) {
spapr->forced_caps.mask |= cap->flag;
} else {
spapr->forbidden_caps.mask |= cap->flag;
}
}
void spapr_caps_validate(sPAPRMachineState *spapr, Error **errp)
{
uint64_t allcaps = 0;
int i;
for (i = 0; i < ARRAY_SIZE(capability_table); i++) {
g_assert((allcaps & capability_table[i].flag) == 0);
allcaps |= capability_table[i].flag;
}
g_assert((spapr->forced_caps.mask & ~allcaps) == 0);
g_assert((spapr->forbidden_caps.mask & ~allcaps) == 0);
if (spapr->forced_caps.mask & spapr->forbidden_caps.mask) {
error_setg(errp, "Some sPAPR capabilities set both on and off");
return;
}
/* Check for any caps incompatible with other caps. Nothing to do
* yet */
}
void spapr_caps_add_properties(sPAPRMachineClass *smc, Error **errp)
{
Error *local_err = NULL;
ObjectClass *klass = OBJECT_CLASS(smc);
int i;
for (i = 0; i < ARRAY_SIZE(capability_table); i++) {
sPAPRCapabilityInfo *cap = &capability_table[i];
const char *name = g_strdup_printf("cap-%s", cap->name);
object_class_property_add(klass, name, "bool",
spapr_cap_get, spapr_cap_set, NULL,
cap, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
object_class_property_set_description(klass, name, cap->description,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
}
|
